Another CL Compressor Search Thread
- Thread starter zekgb64
- Start date
redmondjp
Well-known member
For your needs, I'd probably go for that one - can you hear it running? Same advice regarding startup from zero psi that I gave above also applies.
The big downside to the Quincy pump is that if it needs any work done, you're going to be into it for $$$. The Speedaire pump will be much less pricey to get parts for.
Either way, I don't know that you could go too wrong with either choice at those price points.
redmondjp
Well-known member
So it is a 325, but what is strange is there is usually a Record Of Change or 'R.O.C.' number after the pump model, instead of what appears to be a sequential serial or build number. Maybe somebody else here can chime in on this who has more experience with this - as far as I know the Record of Change goes back to the 1950s or 60s.
Last week I made arrangements to pick up the Speedaire on Saturday and as I was about to hitch up the trailer got an email that stated that he sold it on Friday. So this is turning into quite the ordeal.
So back to the drawing board. I'm traveling this week and saw this unit for $50 and snapped it up sight unseen while away on a business trip. It's obviously not what I'm looking for as a main compressor but hey, it's a 30 gallon Quincy (or at least I assume it is) and it looks pretty cool on that small tank and maybe putzing around with it will provide me with appropriate patience while I keep looking for the main unit. Looks like a single stage pump (once again no plaque on the unit but no intercooler say SS right?) and I don't see any pics that match it perfectly. Any idea what model this is?
So back to the drawing board. I'm traveling this week and saw this unit for $50 and snapped it up sight unseen while away on a business trip. It's obviously not what I'm looking for as a main compressor but hey, it's a 30 gallon Quincy (or at least I assume it is) and it looks pretty cool on that small tank and maybe putzing around with it will provide me with appropriate patience while I keep looking for the main unit. Looks like a single stage pump (once again no plaque on the unit but no intercooler say SS right?) and I don't see any pics that match it perfectly. Any idea what model this is?
Last edited:
Seller sent a few more pictures and it appears that I may have scored pretty decently as this is a 216. Only a 1.5 HP motor on it, but evidently will take up to a 3HP motor and make ~10cfm at max pressure according to this thread. Not bad for $50, I am out of town and won't be able to check it out until Saturday but looking forward to tinkering with it as I continue to search for the main compressor in the garage.
[/IMG]
redmondjp
Well-known member
That's not a bad find for $50! Since I have my Quincy QR-25 brochure opened up in another window at this moment (after replying to another thread), I'll give you the specs for it below.
@min RPM of 400: 4.74 ACFM @100psi
@max RPM of 900: 10.7 ACFM @100psi
So if you come across a bigger motor (and tank as well), or find a 60-gallon tank with either a bad pump or motor on it, you could swap this pump onto it and spin it at 900 with a 3HP motor. Or just use as-is for now while you continue to look.
@min RPM of 400: 4.74 ACFM @100psi
@max RPM of 900: 10.7 ACFM @100psi
So if you come across a bigger motor (and tank as well), or find a 60-gallon tank with either a bad pump or motor on it, you could swap this pump onto it and spin it at 900 with a 3HP motor. Or just use as-is for now while you continue to look.
Lelandwelds
Well-known member
I had an acquaintance who would convert horizontals into verticals, verticals into skids, and swap around unloaders, pressure switches, and heat exchangers like he was trying to carve Michaelangelo's David or recreate Granny's still from the Beverly Hillbillies . They could look factory or like some Steampunk on acid.
I always thought it was the ideal hobby.
I hauled it home today, and noticed that it doesn't have a pressure switch so obviously set up for constant run. I plugged it in to check it out and it came right to life. This is by far the quietest compressor I've ever heard. Granted with its 1.5hp motor and small sheave its only turning the pump at 450 RPM or so but it is almost silent while running. This is a small tank, not even 25 gallons and it pumped to almost 100 psi in about 90 seconds when the unloader popped. I've never seen one in action so I'm not sure how they should behave, the pump was freewheeling but air was escaping from the valve on the side of the pump and the tank pressure dropped slowly until the valve closed and the pump loaded again. Is this proper behavior or is there a check valve or similar that is bad? Is adjusting on/off pressures for the unloaders covered in the manuals when I finally get them from Quincy?
OK I found a tutorial for adjusting the pilot unloader valve and was able to set it to 110 off 90 on without much issue. The fact that tank pressure is dropping while the unloader is tripped indicates a bad check valve at the tank right?
redmondjp
Well-known member
Those Quincy pumps usually don't have a separate check valve; they use the output valves in the pump head. And they could be leaking back, as those poppet valves tend to rust if the pump is not used for a long time.
You can always add a check valve between the pump and the tank if you don't want to go into the valves right now.
OK so there's no check valve on the tank fitting for the piping to the pilot valve. So looking at this, what's stopping tank pressure from escaping when the pilot valve trips at the high pressure point?
Attachments
Last edited:
I spoke to Quincy technical support and as usual the technician I spoke with was great. He described the continuous run behavior and stated that unloaded air should escape through the air filter only and that if any air is escaping the pilot that the internal check valve isn't sealing and that it needs to be replaced. He also mentioned that ROC 19 was produced in 1948, so it's celebrating it's 70th birthday this year, so cool!